<template>
  <a-modal
    :title="title"
    :visible.sync="visible"
    width="800px"
    @ok="handleOk"
    @cancel="handleCancel"
    wrapClassName="ant-modal-cust-warp"
    :closable="false"
    :maskClosable="false"
    centered>
    <a-row class="cropper-content">
      <a-row class="cropper-box">
        <a-row class="cropper">
          <vue-cropper
            ref="cropper"
            :img="option.img"
            :outputSize="option.outputSize"
            :outputType="option.outputType"
            :info="option.info"
            :canScale="option.canScale"
            :autoCrop="option.autoCrop"
            :autoCropWidth="option.autoCropWidth"
            :autoCropHeight="option.autoCropHeight"
            :fixed="option.fixed"
            :fixedNumber="option.fixedNumber"
            :full="option.full"
            :fixedBox="option.fixedBox"
            :canMove="option.canMove"
            :canMoveBox="option.canMoveBox"
            :original="option.original"
            :centerBox="option.centerBox"
            :height="option.height"
            :infoTrue="option.infoTrue"
            :maxImgSize="option.maxImgSize"
            :enlarge="option.enlarge"
            :mode="option.mode"
            @realTime="realTime"
            @imgLoad="imgLoad">
          </vue-cropper>
        </a-row>
        <a-row class="footer-btn">
          <a-row class="scope-btn" :gutter="3">
            <a-col span="6">
              <label style="width: 100%; line-height: 30px;" class="ant-btn ant-btn-primary" for="uploads">
                <a-icon type="file-image" style="padding-right: 5px"/>
                选择图片
              </label>
              <input type="file" id="uploads" style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg" @change="selectImg($event)">
            </a-col>
            <a-col span="4">
              <a-button style="width: 100%;" type="primary" icon="zoom-in" @click="changeScale(1)">放大</a-button>
            </a-col>
            <a-col span="4">
              <a-button style="width: 100%;" type="primary" icon="zoom-out" @click="changeScale(-1)">缩小</a-button>
            </a-col>
            <a-col span="5">
              <a-button style="width: 100%;" type="primary" @click="rotateLeft">
                <a-icon type="redo" style="transform: rotate(90deg)"/>左旋转
              </a-button>
            </a-col>
            <a-col span="5">
              <a-button style="width: 100%;" type="primary" @click="rotateRight">
                <a-icon type="undo" style="transform: rotate(-90deg)"/>右旋转
              </a-button>
            </a-col>
          </a-row>
<!--          <a-row class="upload-btn">-->
<!--            <a-button size="mini" type="success" @click="uploadImg('blob')">上传封面 <i class="el-icon-upload"></i></a-button>-->
<!--          </a-row>-->
        </a-row>
      </a-row>
      <a-row class="show-preview">
        <a-row :style="previews.div" class="preview">
          <img :src="previews.url" :style="previews.img">
        </a-row>
      </a-row>
    </a-row>
  </a-modal>
</template>

<script>
import { VueCropper } from 'vue-cropper'
// import { Comm } from '@/api/index'
export default {
  name: 'CropperImage',
  components: { VueCropper },
  data () {
    return {
      title: '图像裁剪',
      visible: false,
      previews: {},
      option: {
        img: '', // 裁剪图片的地址
        outputSize: 1, // 裁剪生成图片的质量(可选0.1 - 1)
        outputType: 'png', // 裁剪生成图片的格式（jpeg || png || webp）
        info: true, // 图片大小信息
        canScale: true, // 图片是否允许滚轮缩放
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 150, // 默认生成截图框宽度
        autoCropHeight: 150, // 默认生成截图框高度
        fixed: true, // 是否开启截图框宽高固定比例
        // fixedNumber: [1, 1], // 截图框的宽高比例
        full: false, // false按原比例裁切图片，不失真
        fixedBox: true, // 固定截图框大小，不允许改变
        canMove: true, // 上传图片是否可以移动
        canMoveBox: true, // 截图框能否拖动
        original: false, // 上传图片按照原始比例渲染
        centerBox: true, // 截图框是否被限制在图片里面
        height: true, // 是否按照设备的dpr 输出等比例图片
        infoTrue: true, // true为展示真实输出图片宽高，false展示看到的截图框宽高
        maxImgSize: 1920, // 限制图片最大宽度和高度
        enlarge: 0.9999, // 图片根据截图框输出比例倍数
        mode: 'contain' // 图片默认渲染方式
      }
    }
  },
  methods: {
    handleOk () {
      this.uploadImg()
      this.close()
    },
    handleCancel () {
      this.close()
    },
    close () {
      this.$emit('close')
      this.visible = false
    },
    // 初始化函数
    imgLoad (msg) {
      console.log('工具初始化函数=====' + msg)
    },
    // 图片缩放
    changeScale (num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    // 向左旋转
    rotateLeft () {
      this.$refs.cropper.rotateRight()
    },
    // 向右旋转
    rotateRight () {
      this.$refs.cropper.rotateLeft()
    },
    // 实时预览函数
    realTime (data) {
      this.previews = data
    },
    // 选择图片
    selectImg (e) {
      const file = e.target.files[0]
      if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
        this.$message.error('图片类型要求：jpeg、jpg、png')
        return false
      }
      // 转化为blob
      const reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        this.option.img = data
      }
      // 转化为base64
      reader.readAsDataURL(file)
    },
    // 上传图片
    uploadImg () {
      const that = this
      // 获取截图的blob数据
      this.$refs.cropper.getCropBlob(async (data) => {
        const formData = new FormData()
        formData.append('file', data)
        formData.append('subDir', 'icon')
        formData.append('type', 'png')
        Comm.uploadFile(formData).then((res) => {
          that.$emit('uploadSuccess', res[that.$response.DATA].fileUrl)
        }).catch((err) => that.$response.error(err))
      })
    }
  }
}
</script>

<style scoped lang="less">
.cropper-content{
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
  .cropper-box{
    flex: 1;
    width: 100%;
    .cropper{
      width: 480px;
      height: 320px;
    }
  }

  .show-preview{
    flex: 1;
    -webkit-flex: 1;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
    .preview{
      overflow: hidden;
      border:1px solid #67c23a;
      background: #cccccc;
    }
  }
}

.footer-btn{
  padding-top: 20px;
}
</style>
